Was running towards back of a group to help get carried to a faster time, group broke apart and I stayed behind a woman since she was going pace I wanted. Wind was pushing us forward and I was behind so that I could just focus on staying with her. She got mad and accused me of drafting. I said I was sorry and pushed ahead to do my share of leading for a bit in return.
Came up behind another runner and as soon as I was behind her she accused me of drafting also and yelled at me to go by already.
Is it bad etiquette to run behind someone for a little while? This was first half for me so I'm don't know any unspoken rules / codes or anything.